He followed up that status update with an even more explicit threat. "Well Ima Assassinate president Obama this evening !...Gotta get this monkey off my chest while he's in town -_-" Sims said, adding that the "Secret Service is gonna be defenseless" when he carries out the deed with an assault rifle aimed "at Barack's Forehead."

Later, however, at a police station, he grew penitent, and wrote an apology letter asserting "he was sorry he sent the messages threatening to kill the President of the United States."

The self-described #1 Lupe Fiasco fan claimed he was high at the time and "understood what he was doing and that it was wrong." And though he did express a hatred for the president, that feeling did not carry over to the First Lady, whom he described as "sexy as Hell" in a separate tweet.

Sims remains behind bars tonight. He has a federal detention hearing set for next week.